Print or check SHA256 (256-bit) checksums. With no FILE, or when FILE is -, read standard input.
-b, --binary
read in binary mode
-c, --check
read SHA256 sums from the FILEs and check them
--tag create a BSD-style checksum
-t, --text
read in text mode (default)
Note: There is no difference between binary and text mode option on GNU system.
The following four options are useful only when verifying checksums:
--quiet
don't print OK for each successfully verified file
--status
don't output anything, status code shows success
--strict
exit non-zero for improperly formatted checksum lines
-w, --warn
warn about improperly formatted checksum lines
--help display this help and exit
--version
output version information and exit
The sums are computed as described in FIPS-180-2. When checking, the input should be a former output of this program. The default mode is
to print a line with checksum, a character indicating input mode ('*' for binary, space for text), and name for each FILE.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report sha256sum translation bugs to <http://translationpro-
ject.org/team/>

AUTHOR

Written by Ulrich Drepper, Scott Miller, and David Madore.

COPYRIGHT

Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

The full documentation for sha256sum is maintained as a Texinfo manual. If the info and sha256sum programs are properly installed at your
site, the command
info coreutils 'sha256sum invocation'
should give you access to the complete manual.
GNU coreutils 8.22 June 2014 SHA256SUM(1)